Molding apparatus.



M. J. HEWLETT. MGLDING APPARATUS. LII'LIUTA FILED DEU. 8, 1905.

PATENTEI) JUKE 19, 1906 8 SHEETS-SHEET 1 PATENTED JUNE 19, 1906.

6 SHEETS-SHEET 2.

PATBNTBD JUNE 19, 1966. M. s. HEWLETT. 2 MOLDING APPARATUS. PPLIGATIN E'ILBD DEU. 8. 1905.

B SHEETS-EHEIM' 3.

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PATBNTBB JUNE 19, 190s.

M. J. BSWLBTT; Mmmm@ APPARATUS. APPLIGAHGX FILED 1326.8. 1995.

a SHEETS-SHEET 4.

I f/ (Arx, al??? PATENTED JUNE 19, 19%.

. M. J. HEWLETT. MOLDING APPARATUS.

APPLIUATION FILED 1336.8! 1905.

E SHEETS-SHEET 5.

No. 823,530 PATENTED JUNE 19, 1906 M. r. HEWLETT. MOLDING APPARATUS.

APLUTION FILED 1720.8, 15105.

8 SHEETS-SHBBT 6.

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UNITED STATES PATENT coince. y

MADDRA J. HEWLETT, F KEWANEE, iLLixois, AssiusoR oF ONE-HALF To HnisELF AND ONE-HALF To ALFRED n. HEWLETT, or, REWA- NEE, ILLINOlS.

Speccation of Letters Patent.

Patented June 19, 1905.

Application filed December 8,1905. Sai-iai lic. 299;'981# ence being had to the accompanying drawmy invention relates to moldin apparatus,

and particularly to apparatus or molding sand in molds or flasksaccording to the process illustrated and" described in the applica- 4tion of Alfred M. Hewlett for method of inciding Serial No; 189,390, led J enuary 16, 1994 and is an im rovement or modification of the lustrated and described-in 'the joint application of said Alfred M. Hewlett end inyself, Serial No. 177,353, filed October 16,1903. a

Aecordin to theV Hewlett method shove referred tot e send is carried from s. suitable reservoir or storage compartment into the mold or llesk by means of the expsnsivefogoe of compressed air, and in the sppsrstussrosn Y in the drawings and described in seid Herv lett und Hewlett application the send is stoned .in a storageohamber or compartment erranged to communicate at the bottoni with the mold or flask through s contracted outlet or outlets. Compressed air is admitted et the to of the sand-chamber and escapes thr ug the outlet at the bottom, carrying san with it into the mold, which it packs therein by its expensive force, the air filterY expansion escaping through the cracks in the mold or between the mold, its support, and the., send-chamber. In such apparatus as illustrated in seid ap licetion the sir is edmitted to the sendamber after the mold is in position to receive its char e of sand, and said apparatusA in the foriii sliown is especially designed for use in making cores.

My present application relates to a machine oi the same general cheracter involving the some generic features; but it has to do more particularly with a construction designed to be emlployed in connection with mnking'ssnd-mo dslsrge coi-es, or in other situations where e. greater quantity of sand is required for cachee erste operation. it mcy be said, however, t at my improved op; patatas is not. restricted in its use vto large Work, but may also be employed genersll,r

for molding send into cores or for molds for l any kind of castings made of brass, cost-iron, c or any metal to be poured. The objectief my invention is to provide a simple, quick-acting, and efficient molding.-

i machine snd ilaskin which the slidniethodi 6o is utilized, the 4sand bein carried into and packed uniformly throng out the iliiskfuziV other rece tecla by the expsnsive force of compresse mr. A further object is to improve and sim lify 1 the construction and Yo ersion of inoldin machines, thereby ren eringthem capab e of incl-ring better molds and doing thereon-lc4 more rapidly, 'thus reducing the cost of man f ,j uaeture. l 7o I accomplish these'objects 'es illustrated in the drawings and as hereinafter described. l. What I regard es new is set forth in the.

Y claims.

In the eccompenring drawings, 'Figure 1 is 7 5 e side elevation o `my improved molding?, machine. Fig, 2 is an end view.- Fig. Sipra .-I cross-section on line 3 3 oiFig. l. cross-section online 4 4 of Fig. i'.

'Figiii'iit Fig. 5 Ylongitudinal vertical section on line 5 5 of .v 8o.

e. Fig. 6 is s plan view. Fig. 7 vis s perspective view illustrating purl o .the operating mechanism. Fig. 8 is n perspective View showing port ci one of the valve-plates for the sand-chamber. Fig. 9 is a vertical sec- Y85 tion on line 9 9 of Fig. 5. Fig. l0 is an enlsrged detail, being a. vertical sectional view of one side ofthe flask. Fi 11` is s horizontal section on, line l1 il of ig. l0. 12 is a vertical sectional view showing o, modiii 9o Y cation. Fig. 13 is a. vertical section en line, y 13 13 of Fig'. 3.2, and 14 is a. horizontal section online 14 14 of ig. 13- f In molding-machines employing the ex- Apensive force of compressed air to carry the sand into and pack it in the mold, as deseribd .4 in the applications above referred to, where. i i the mold is small entirelv satisfactory re l: suits are secured by provi ing only a single outlet or essage from the sand orv compresroo sion cham er to the mold; butl I have found that in' larger machines or machines em.

played to pack the sand in a ilaslror mold that is very large it is desirable to introduce the sir carrying the sand into the desk stvs 105 rions points, and to further facilitate the pier-king of the sand in the ilask or mold b :.Sicwing'the air to escape therefrom throng numerous peiforatioiis too small to allow the sand to escape, also that in such construcf tionsgreater eil'iciency is secured by retaining the compressed air under suitable. compression in t 1e compression or sand chamber instead of admittingr a new charge of conipressed air thereto at the time of each operation, and these improved features are einbodied in the machine which forms -the sub 'ject-matter of v'this application. Certain other improved features are also embodied therein,.which are fully illustrated in the drawingsfand will be hereinafter described. Referring to the drawings for a detailed 5 'description of the s eciiic embodiment of my invention therein il ustrated, indicates the sand` or compression chamber or reservoir in which sand u'sedtc fill the molds or flasks 1s placed in bulk, a suitable quantity being gq" emplo ed, so that a fresh supply is provided o y a er a greater or less number of operations.` In other words,- the capacity of the sand-chamber is considerably greater than lthat of anyone of the flasks or molds to be z5 filled. Said chamber is constructed to with stand a pressure of .compressed air usuallyY from about eighty to one hundred pounds to the square inch; but it will be undertood that where it is desired to employ greater or less i will depend upon such requirements. Prefl erably the sand-chamber is cylindrical in l form, as shown in Fig; but this also maybe a v m'eg. 3.35 The sa'nd-chamberis closed at the bottom i by a bottom 'or cover plate 17,'as best shown in Fig-5.

The bottom plate is carried on suitable standards A-B C D, as shown in Figs. l and 5. The bottom plate is provided with a number. m. of perforations 18, disposed at intervals over i its surface and extemlingthrough it, as shown in Fi 5 It is also provided with a number of vave plates or slide-s 19, one of which is `shown in Fig. 8 and which are further illus- ,5 trated in Figs. 2, 3,*mid 5. :Suid valvcfplatcs are arranged to slide. in suitable horizontal .passages in the bottom plate 16 and are connected at or near one 20, (best shown in Figs. 2, 3, and 5,) one crossbar being preferably placed above an thc )n other below said plate, as illustrated. The valve-plates I9 are provided wi t h pcrforations 22, as best .shown in Fig. 8, which perforations are adapted to register withthc passages 1'8 in the bottom plaie when said plates are moved to the proper position, :is illustrated '9.5 in Fig. 5. By this construction by reciprocating the platt-s 19 the ontlcts la may lio opened 0r Closed to permit the sand and compressed air to escape or to contini thcni in the sand-chamber. The plates therefore f, compose Collectively uti outlet jvtilvc by which the escape of compressed air and sand iq controlled. Said outlet-vulve is operated 3Q pressure the strength'of the sand-chamber` plate 16 and at the top by a top 'Said pipe communicates source of supply of-compnessed air,so` that by means of a levier 23, nior'inted upon a suitable pivot 24, carried by a stud The lowerend of the lever 23 is forked to pro vide arms 26, as shown in Fig. 2 which are ,corr nected by links 27 with bloc s 28, carried at the ends of the cross-bars 20, as best shown in Filg. 7. `1nst cad of this arrangement anyot ier suitable arrangement maybe employed for reciprocating t-he valve.

he top or cover plate 17 is providedi with a suitable openin 29, through which sand is introduced. Sai' opening 1s covered by a cap 30, carried at the lower end of a screw 31, fitted in a swinging bar 32, as-shown in Fi 1 and 5. Said bar is mounted at one end on a suitable stud or pivot 33, Sothat it may swing over or away from the opening 29 to carry theeap 30 intoor out of sition. When the cap is in operative position, one end of the bar 32 liesu'ndera lug 34, projecting from a suitable stud 35,. carried. by -the cover-plate, figures, so that thecap 30 maybe forced dpwn tightlyover the opening 29. For this pose tliescrew ,31'A Ais provided with a -Whee 36.1 Theca'p 30 a suitable packing-ring 37,

so as to insure a tigl t, closure of said opening, and the connec#` .tion betweemthe screw 31Aand the cap 30 is` packed or otherwise made .tight. 38 indilcatas an air-pipe, whichjoonnccts with' the sand-chamber through a suitable openin in the eover-p Said ari eis rovided'with 4a valve 39,. controllet yA a ever 40 or other suitable. means for admitting air to] the sandchamber operative pov 4 I l as shown in said late 17, as shown in Figs. 2 an 6.

and for opening and closing the pipe .38.

with. a; suitable by o ening t e valve 39 air is admitted to the san sehamber, and by closing said valve the airis confined in said chamber. By connecting the sand-chamber with suitable mechan-A ism for maintaining a substantially constant pressure in, the sand-chamber the valve 39 may be allowed to 4remain 4open or partly open during the operation of 4moldin 4I indicates a petcock or equivalent'device for reducing the pressure of the air in the sandcharnber. By closin the valve 39 and open ing the petcock 4l t e pressure in the sandchambcr may be reduced as desired. i

42 indicates4 a truck or carriage Vwhichis adapted to convey the fiask into and out of operative position. Said truck is mounted on wheels 43, adapted to run on a track 44,4 as shown in Fi .'5, and is preferably provided on its under side with blocks or brackets 45, adapted to overlie cams 4.6 when the truck is in position to support the flask in operative position. Said cams are carried b s afts 47, suitably mounted and connecte b levers 48 49 and connecting-rods 50, as s own in Fig. l. 'lhe levers 48 49 are arallcl, so that by operating the lever 49 bot cama 46 may IIO isprovided with :1

llo

An adjustable lend stop 94 is also pi ot cito inc' :ur to expand in the mold aiid distribute 65 to limit the 'endwise movement of the iuoid, t iin .sund therein hy its expansive force.

said stop boing he'ld in its ditlcrcni'. posit tous of adjustment by aholt 9:3, as shown in Figs. 12 and 14. The bottom plate Sl is supporctl b standards 96, c'inectcd with it. near its edges, so as to Yermit free access to the un der surface ol' t e bottom plate, asshown in -Fig. 13155.50,l far as the operation of actual molbding`-isqoi'i'lcerned the ap mratus .of Figs. l2, 13, and'll'is substantially the saine 'as that of the other apparatus; but in other rcspects it is a simplification designed for use' in connection `vith thc making of smaller moldsl where the, mold or flask may he readily.

placed inposition by hand.

n will bestowed trinity providing t plurality -of" outletfplssages for the com-V pressed air and sand a general distribution of the ail," and 'sand throughout the mold or.

llask,"togetherwith its' proper packing at all points-therein, s insured.l Iturthermore, by varying the number of the perforated vnlveplatesl'and the arran'vement of the perfo.-

ratious therein it, s'pssihle to easil y vary the distribution (if the ait-fand sand where such special distribution deemed desirable to meet peculiar conditions.

It'will beundcrstood that'while l have described With'considerable minutencss the par ticular embodimentsE of my invention illustratcd inthe accompanying drawings l do not restrict myself to the specific details of x the construction` illustrated and described, as

my invention includes fcncricnlly thc suhject-nlatter of the lbroat cr claims` as woll as the more specific features ppinted onlin thc narrower claims. t

`'I`hfltwhich I claim as my invention, and desire to secure by Letters latent, is

-IJA sand-molding apparatus. comprisinpr afs'and-holdiug receptacle havingr a pluralit v .if sandoutlets`,'-means for supporting the mold adjacent thereto,valve mechanism cons .trolling said outlets, and menus for supply- `ing compressed air'to said receptacle.

2. A sand-n1oldiug apparatus, couiprisinpr a sand-receptmle having u plurality of sand outletsin'the lower portion thereof, means for supporting the mold adjacent to said out-- lets, valve mechanism controlling;r .said outlets, and means for supplying compressed air to said receptacle.

3. A sand-molding,r apparatus, comprisinpr 'a sand-receptacle having a plurality of saudoutlets in the bottointIn-.reol means for .supporting the mold adjacent. to said outlets, valve mechanism controlling said outlets, and means for supplyingv compressed air to said receptacle.

4.- A sand-molding4 apparatus, comprisingr a moldsupport, and means For introducing com ressed air charged with sand into the mold, at a plurality of points and permitting,y

A seud-moldiinr apparatus, comprising u mold-support, and xieans for introducing i compressi-d nir char fed with sand intol the mold at n plurality o points, said means hav- `7c in; u plurality of contracted discharge-pa .Qtlgrl (i. A sund-molding apparatus,'comprising a sand-chamber ada )ted to contain sandiutider pressure, means i mold, und valve mechanism therefor. f

7. A sand-molding apparatus, comprising a sand-cha mher adapted to contain san'd up.- l der pressure, outlet-passares arrimgedY w supp y the sand to the mol at a plurality of 8e points, and valve mechanism for-said outlet-'f1 passages.

8. A sand-molding apparatus, comprising` a sand-chamber havin a luralit ofout-I' lets, means for supporting t 1e mol 'adiacent' B5,Y to said outlets, a mold having a plurality ofi u'. nir-escape openings,and means for discharging compressed air charged with vc anrl'frcm said sand-chamber into said mold. i i- 9. A sand-moldingr apparatus, comprising 99 .n sand-chamber having a luralit of out-` lets, means for supporting t 1e mol( 'adjacent f to said outlets, a mold having n plurality of d Y nir-escupe openings, n d valve mechanism controllingy said outlets. lt). A sund-molding apparatus, comprising ai saudreccptswle having a plurality of out-."- let.pussnges in the bottom thereof, valve mechanism controlling said outletfpnsm.

incuns for supportingthe mold adlacen to I OO' outlct-pPassages, means orrsppporting theirs.

mold adjacent to said outlet-passages, andi moans for supplying compressed airto said" sand-receptacle. 13. A sand-moldingapparatus,comprising u a mold or flask having a plurality of minute" n openings adapted to permit the escape ofair therefrom while sand is retained therein, and means for introducing compressed'aircharged with sand into said mold. r-

MADDRA J. HEWLETT. Witnesses:

It. L. PRIESTMAN, F. L. PINKuAM.

r admitting sand'w .th .15

. uns, l 

